Postal worker flaunting stacks of cash online stole mail for years in CA, feds say

A former California postal carrier faces prison time over stealing mailed checks, credit and debit cards, some of which federal prosecutors said she used to book international trips and buy luxury items.

Mary Ann Magdamit, 31, of Carson, in Los Angeles County, stole from the mail between at least 2022 until July 2025, according to the U.S. Attorney’s Office for the Central District of California.

In those three years, Magdamit sold some of the checks, credit and debit cards she stole to “accomplices” involved in the scheme, prosecutors said.

While under investigation, Magdamit, who had worked for the U.S. Postal Service at the Torrance Main Post Office, about a 20-mile drive southwest from Los Angeles, posted content on Instagram showing her vacations Turks and Caicos and Aruba as well as different purchases she secured with “illicitly obtained funds,” prosecutors said.

One of her posts shared on April 24 included her holding four shopping bags from Louis Vuitton and Dior with a location tag showing she was at Rodeo Drive, a street known for luxury shopping in Beverly Hills, according to court filings.

She was also seen flaunting “stacks of hundred-dollar bills” on Instagram, according to prosecutors.

Two photos of Magdamit holding stacks of cash, which she told a federal investigator she obtained with debit cards “she stole,” are included in an affidavit filed with a criminal complaint.

Now Magdamit has pleaded guilty to one count of conspiracy to commit bank fraud on Aug. 11 in connection with the theft, the U.S. Attorney’s Office said in an Aug. 11 news release.

A federal public defender appointed to represent Magdamit did not return McClatchy News’ request for comment Aug. 12.

Over 100 stolen cards found at apartment

During a search of Magdamit’s apartment in December, authorities found 133 credit and debit cards, 16 U.S. Treasury checks as well as a loaded “ghost gun,” a firearm without a serial number, “with an extended 27-round magazine, according to prosecutors.

“Agents also discovered luxury goods purchased with cards she stole from the mail,” prosecutors said.

After the search, Magdamit resigned from working as a letter carrier on Dec. 9, the Torrance Main Post Office informed a federal investigator, according to the affidavit.

Despite leaving her post, she still managed to obtain more stolen mail, as well as other people’s personal identifying information, and made “purchases with victims’ credit cards,” prosecutors said.

Magdamit would activate the credit and debit cards belonging to other individuals to use them for trips abroad and different purchases, according to the U.S. Attorney’s Office.

As part of her three-year scheme, prosecutors said “she also arranged to have her co-conspirators cash the stolen checks, usually by people using counterfeit identity documents in the name of the check’s payee.”

Magdamit was arrested on July 1, when authorities found additional stolen cards at her apartment, according to prosecutors.

She is still in federal detention, the U.S. Attorney’s Office said. Her sentencing is set for Oct. 27.

Magdamit faces up to 30 years in prison, according to prosecutors, who said she will be forfeiting a Rolex watch and other items she purchased.

This story was originally published August 13, 2025 at 8:54 AM with the headline "Postal worker flaunting stacks of cash online stole mail for years in CA, feds say."

Julia Marnin

McClatchy DC

Julia Marnin covers courts for McClatchy News, writing about criminal and civil affairs, including cases involving policing, corrections, civil liberties, fraud, and abuses of power. As a reporter on McClatchy’s National Real-Time Team, she’s also covered the COVID-19 pandemic and a variety of other topics since joining in 2021, following a fellowship with Newsweek. Born in Biloxi, Mississippi, she was raised in South Jersey and is now based in New York State.